package jdbc;

import com.alibaba.druid.pool.DruidDataSource;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

/*
数据库工具类
 */
public class DBUtil {
    //使用阿里提供的数据库连接池
    private  static DruidDataSource dataSource=new DruidDataSource();
    static{
        dataSource.setUrl("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true");
        dataSource.setUsername("root");
        dataSource.setPassword("root");
        dataSource.setMaxActive(20);//设置数据库连接池的最大连接数为20
        dataSource.setInitialSize(1);//设置数据库连接池的初始连接数为1
        dataSource.setMinIdle(1);//最小连接数
    }
    /*
    static {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
     */
    public static Connection getConnection() throws SQLException {
       /*
        return DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root");

        */
        return dataSource.getConnection();
    }
}
